Pneumatic vehicle-tire.



J. J. DITTENHOEFER.

PNEUMATIC VEHICLE TIRE.

APPLICATION FILED SEPI 2, 1913.

1,089,9 l 3. Patented Mar. 1o, 1914.

@am I@ JEROME J. DITTENHOEFEB, OFCHICAGO, ILLINOIS.

PNEUMATIC VEHICLE-TIRE.

Specication of Letters Patent.

Patented Mar. 10, 1911.

Application filed September 2, 1918. Serial No. 787,722.

To all whom it may concern:

Be it known that I, JEROME J Dim-EN nonnen, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Pneumatic Vehicle-Tires, of which the following is a specification. j

My invention relates to improvements in pneumatic vehicle tires and has for its object the production of a tire provided with a plurality of independent air compartments whereb in the event of the puncture of one of sai compartments the other compartment may be utilized so as to obviate the necessity of immediate repair of the punctured tire before the same may again be utilized.

A further object is the production of a vehicle tire as mentioned which will be of simple construction and efficient in use.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawing forming a part of this specification and in Which- Figure 1 is a. cross section of a vehicle tire embodying my invention, Ione of the air compartments of the tire bein shown utilized in this figure, and Fig. 2 is a sec tion similar to Fi 1 kshowing the vother air compartment o the tire being used.

Thepreferred form of construction as illustrated in the drawing comprises an air tube 1 formed of fiexible material such as rubber which is arranged in a conventional tire casin 2 mounted in a clencher rim 3. The interior of tube 1 is divided by a longitudinally extending medial partition 4 into coextensive independent inner and outer compartments 5 and 6 which extend completely around the tire as will be readily understood. The partition 4 is of a width equal to substantiall `one-half of the circumference of the tu 1 so as to adapt the same to lie fiat against the inner or outer portions of the tube 1 as shown in Figs. 1 and 2 respectively. Communicating with the compartment 6 is' an air inlet tube 7 the inner end of which is connected as shown with the partition'4, the outer end of said tube 7 projecting exteriorly and being equipped with the conventional air governis first utilized in which event the air inlet tube 7 will assume the position shown in Fig. l or at its outer terminal of movement in tube 10. Said tube 7 is held, in this case, against relative movement in tube 10 by means of a collar 11 threaded upon the outer end of tube 7 which engages against the corresponding end of tube l0 as shown in Fig. 1. Inflation of the tire is of course effected by attachment of a pump or air supply to the outer end of tube 7, the cap 9 bein removed for this purpose as will be readily understood.

In the event of a puncture to the outer Wall of tube 1 or of compartment 6 the collar 11 is removed from tube 7 in order to release the latter and permit of the partition 4 being fiexed outwardly to the position shown in Fig. 2 so as to permit of utilization of compartment 5. In utilizing compartment 5 a cap 12 is threaded upon the outer end of tube 10. Said cap 12 is provided with an axial air passage therethrough whichis controlled by a valve 13 of the same character as valve 8. The outer end of cap 12 is formed to correspond with the outer end of tube 7 so that inflation of the compartment 5, after the arrangement of cap 12 as shown, maybe effected by simply attaching said end of said cap to a pump or source of air supply. The cap 9, after inflation of the compartment 5 may be arranged over the outer end of cap 12 as shown in Fig. 2. The cap 12 which is arranged over the outer end of tube 10 when the second or inner air com artment is being used is so formed as to a ord clearance for the outer end of tube 7 in order to permit of free movement of the latter longitudinally of tube 10 as will be the oase when the vehicle is running and the tire is compressed. Also the tube 7 is of such a length that, When the partition 4 is in outwardly flexed position the outer end of said tube will project slightly into the inner end of the tube 10, in order to insure against nonregistration or the tube 7 'with the tube l0 during the compression of the tire; it being understood that freedom of movement ot the tube 7 in tube 10 must be insured in order to secure freedom of compression of the tire when in use, With this arrangement it will be seen that tvlo air compartments instead of one, as is usual, are provided in the air tube or' the tires so that in the event or' the puncture of one ot said compartments the other may be utilized thereby obviating the necessity or stopping to repair the puncture before the tire may again be used. Y Y

While il have illustrated and described the preferred form of construction for carrying my invention into e'ect, this is capable oit variation and modification Without departing from the spirit of the invention. if, therefore, do not Wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modiications as come Within the scope of the appended claim.

Having described my invention What ll claim as ner;l and desire to secure by Letters Patent is:

A pneumatic Vehicle tire comprising an air tube divided longitudinally by a idexible partition into inner and outer co-extensive independent compartments; a valved air inlet tube communicating with said outer coinf partinent, said tube beingconnected at its inner end with said partition and passing exteriorly loosely through the inner wall of ausente:

said air tube; a second tube communicating with said inner compartment and being connected at its inner end with the inner Wall of said air tube, said second tube loosely surrounding said tirst tube so as to forman annular' air passage through said second tube around said iirst tube and permit of Jtree longitudinal movement of the latter in said second tube7 said rst tube being of such a length that, When said partition is in outwardly Herod position, the outer endl of said tube Will project slightly into the inner end oi said second tube; and an elongated valved cap adapted for arrangement over the outer end of said second tube, said cap having a medial passage therein registering with the passage through said second tube, the inner end of said passage through said cap being enlarged3 said enlarged portion of said passage being of such a length and Width as to permit ot free longitudinal movement of said rst mentioned tube thereinto Without the outer end of said tube striking the inner end of. said enlarged portion, when the tire is compressed and with the inner compartment in use, substantially as described.

in testimony whereof li have signed my name to this specication in the presence of tivo subscribing Witnesses.

inner/rn a. nrrrn'nnonrnn.

iditnesses:

B, Gt Rrormnns HELEN F., Lunas. 

